package com.atguigu.gmall.item.controller;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.atguigu.gmall.list.client.ListFeignClient;
import com.atguigu.gmall.model.product.BaseCategoryView;
import com.atguigu.gmall.model.product.SkuInfo;
import com.atguigu.gmall.model.product.SpuSaleAttr;
import com.atguigu.gmall.product.client.ProductFeignClient;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.math.BigDecimal;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.ThreadPoolExecutor;

/**
 * @author 李旭
 * @date 2021/10/9 9:50
 * @Description:
 */
@RestController
@RequestMapping("/api/item")
public class ItemApiController {


    @Autowired
    private ProductFeignClient productFeignClient;
    @Autowired
    private ThreadPoolExecutor threadPoolExecutor;
    @Autowired
    private ListFeignClient listFeignClient;

    //获取商品详情页面所需要的数据 汇总  JUC == 多线程 + 锁  异步编排
    @GetMapping("/getItem/{skuId}")
    public Map getItem(@PathVariable Long skuId) {
        Map result = new HashMap();

        //1:skuInfo
        CompletableFuture<SkuInfo> skuInfoCompletableFuture = CompletableFuture.supplyAsync(() -> {
            SkuInfo skuInfo = productFeignClient.getSkuInfo(skuId);
            result.put("skuInfo", skuInfo);
            return skuInfo;
        }, threadPoolExecutor);

        //2:一二三级分类
        CompletableFuture<Void> categoryViewCompletableFuture = skuInfoCompletableFuture.thenAcceptAsync((skuInfo) -> {
            BaseCategoryView baseCategoryView = productFeignClient.
                    getBaseCategoryView(skuInfo.getCategory3Id());
            result.put("categoryView", baseCategoryView);
        }, threadPoolExecutor);

        CompletableFuture<Void> priceCompletableFuture = CompletableFuture.runAsync(() -> {
            //3：实时价格
            BigDecimal price = productFeignClient.getPrice(skuId);
            result.put("price", price);
        }, threadPoolExecutor);

        //4:销售属性及属性值及选中
        CompletableFuture<Void> spuSaleAttrListCompletableFuture = skuInfoCompletableFuture.thenAcceptAsync((skuInfo) -> {
            List<SpuSaleAttr> spuSaleAttrListCheckBySku = productFeignClient.
                    getSpuSaleAttrListCheckBySku(skuInfo.getSpuId(), skuInfo.getId());
            result.put("spuSaleAttrList", spuSaleAttrListCheckBySku);
        }, threadPoolExecutor);

        //5:组合与对应的skuId
        CompletableFuture<Void> valuesSkuJsonCompletableFuture = skuInfoCompletableFuture.thenAcceptAsync((skuInfo) -> {
            Map skuValueIdsMap = productFeignClient.getSkuValueIdsMap(skuInfo.getSpuId());
            result.put("valuesSkuJson", JSONObject.toJSONString(skuValueIdsMap));
        }, threadPoolExecutor);
        //6:加分
        CompletableFuture.runAsync(() -> {
            listFeignClient.incrHotScore(skuId,1);
        }, threadPoolExecutor);
        //多任务组合   所有
        CompletableFuture.allOf(priceCompletableFuture,categoryViewCompletableFuture
        ,spuSaleAttrListCompletableFuture,valuesSkuJsonCompletableFuture).join();
        return result;
    }
}
